LAWS.at_append_add: law of bend-osdev-bytes@0.1.1.0
Import: import bend-osdev-bytes@0.1.1.0/LAWS.bend as LAWS
Lines 424-428 of bend-osdev-bytes@0.1.1.0/LAWS.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-bytes@0.1.1.0/LAWS.bend&start_line=424&end_line=428

import Base
import bend-osdev-bytes@0.1.1.0/bytes.bend as B

law at_append_add:
  for +a: List<&2, U32>
  for +b: List<&2, U32>
  for +i: Nat
  {B.at(B.append(a, b), Nat.add(B.len(a), i)) == B.at(b, i) : Maybe<&2, U32>}

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.cong
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/PROOF.bend&name=off.ldrop_app_add
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=append
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=at
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=at.head
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=drop
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=len